Hash.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <vector>
 
struct KeccakHashInstance;
 
namespace Belle2 {
  class SHA3Hash {
  public:
    enum EHashMode {
      c_SHA3_224 = 224 / 8, 
      c_SHA3_256 = 256 / 8, 
      c_SHA3_384 = 384 / 8, 
      c_SHA3_512 = 512 / 8 
    };
    explicit SHA3Hash(EHashMode length);
    SHA3Hash(const SHA3Hash&) = delete;
    ~SHA3Hash();
    void clear();
    void update(int n, unsigned char* buff);
    void getHash(unsigned char* buff);
    std::vector<unsigned char> getHash();
  private:
    KeccakHashInstance* m_instance;
    EHashMode m_mode;
  };
 
  class ShakeHash {
  public:
    enum EHashMode {
      c_SHAKE128, 
      c_SHAKE256, 
    };
    explicit ShakeHash(EHashMode mode);
    ShakeHash(const ShakeHash&) = delete;
    ~ShakeHash();
    void clear();
    void update(int n, unsigned char* buff);
    void getHash(int n, unsigned char* buff);
  private:
    KeccakHashInstance* m_instance;
    EHashMode m_mode;
  };
} //Belle2 namespace